Note: Javascript is disabled or is not supported by your browser. For this reason, some items on this page will be unavailable. For more information about this message, please visit this page:
http://www.noaa.gov

This essay describes, in outline, the basic physics, structure, and design of the new NMC forecast models 8L-GLOPEP and 8L-HEMPEP. Where appropriate, differences between the 8-layer and 6-layer (6L PE) models are indicated.

"In a latitude-longitude coordinate system, with the mathematical pole located at the geographic pole, the convergence of the meridians (as one moves northward) brings the grid points sufficiently close together that the CFL linear stability criterio...

A description of major areas of research of the Development Division of the National Meteorological Center (NMC) is presented. The numerical modeling program is pointed in two main directions. One is in the area of regional modeling for short-range p...

"The National Meteorological Center has operated for many years on a twice-daily cycle of data collection, processing, and analysis centered on 00 GMT and 12 GMT. This cycle accepts all data judged to be useful from observations taken at or near thos...

"This study expands the National Meteorological Center's verification program for primitive equation models into the domain of wave numbers. The specific model used for this study is explained in more detail in Section 3, but similar techniques will ...